From http://www.jwz.org/xscreensaver/xscreensaver-5.27.tar.gz

[xscreensaver] / OSX / Updater.m

diff --git a/OSX/Updater.m b/OSX/Updater.m
index 94a3afaeb9b64000873599eba852e86b55e8454f..1bf29fa2e841d99fb9662125ae83b1c520978671 100644 (file)
--- a/OSX/Updater.m
+++ b/OSX/Updater.m
@@ -24,30 +24,150 @@
 
 - (void)applicationDidFinishLaunching:(NSNotification *)aNotification
 {
-  SUUpdater *updater = [SUUpdater updaterForBundle:
-                                    [NSBundle bundleForClass:[self class]]];
   NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
   [defs registerDefaults:UPDATER_DEFAULTS];
 
+  // If it's not time to run the updater, then bail immediately.
+  // I'm not sure why this is necessary, but Sparkle seems to be
+  // checking too often.
+  //
+  if (! [self timeToCheck])
+    [[NSApplication sharedApplication] terminate:self];
+
+  // If the screen saver is not running, then launch the updater now.
+  // Otherwise, wait until the screen saver deactivates, and then do
+  // it.  This is because if the updater tries to pop up a dialog box
+  // while the screen saver is active, everything goes to hell and it
+  // never shows up.  You'd expect the dialog to just map below the
+  // screen saver window, but no.
+
+  if (! [self screenSaverActive]) {
+    [self runUpdater];
+  } else {
+    // Run the updater when the "screensaver.didstop" notification arrives.
+    [[NSDistributedNotificationCenter defaultCenter]
+      addObserver:self
+      selector:@selector(saverStoppedNotification:)
+      name:@"com.apple.screensaver.didstop"
+      object:nil];
+
+    // But I'm not sure I trust that, so also poll every couple minutes.
+    timer = [NSTimer scheduledTimerWithTimeInterval: 60 * 2
+                     target:self
+                     selector:@selector(pollSaverTermination:)
+                     userInfo:nil
+                     repeats:YES];
+  }
+}
+
+
+- (BOOL) timeToCheck
+{
+  NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
+  NSTimeInterval interval = [defs doubleForKey:@SUScheduledCheckIntervalKey];
+  NSDate *last = [defs objectForKey:@SULastCheckTimeKey];
+  if (!interval || !last)
+    return YES;
+  NSTimeInterval since = [[NSDate date] timeIntervalSinceDate:last];
+  return (since > interval);
+}
+
+
+// Whether ScreenSaverEngine is currently running, meaning screen is blanked.
+// There's no easy way to determine this other than scanning the process table.
+//
+- (BOOL) screenSaverActive
+{
+  BOOL found = NO;
+  NSString *target = @"/ScreenSaverEngine.app";
+  ProcessSerialNumber psn = { kNoProcess, kNoProcess };
+  while (GetNextProcess(&psn) == noErr) {
+    CFDictionaryRef cfdict =
+      ProcessInformationCopyDictionary (&psn,
+        kProcessDictionaryIncludeAllInformationMask);
+    if (cfdict) {
+      NSDictionary *dict = (NSDictionary *) cfdict;
+      NSString *path = [dict objectForKey:@"BundlePath"];
+      if (path && [path hasSuffix:target])
+        found = YES;
+      CFRelease (cfdict);
+    }
+    if (found)
+      break;
+  }
+  return found;
+}
+
+
+- (void) saverStoppedNotification:(NSNotification *)note
+{
+  [self runUpdater];
+}
+
+
+- (void) pollSaverTermination:(NSTimer *)t
+{
+  if (! [self screenSaverActive])
+    [self runUpdater];
+}
+
+
+- (void) runUpdater
+{
+  if (timer) {
+    [timer invalidate];
+    timer = nil;
+  }
+
+  SUUpdater *updater = [SUUpdater updaterForBundle:
+                                    [NSBundle bundleForClass:[self class]]];
+  [updater setDelegate:self];
+
   // Launch the updater thread.
   [updater checkForUpdatesInBackground];
 
   // Now we need to wait for the Sparkle thread to finish before we can
   // exit, so just poll waiting for it.
+  //
   [NSTimer scheduledTimerWithTimeInterval:1
            target:self
-           selector:@selector(exitWhenDone:)
+           selector:@selector(pollUpdaterTermination:)
            userInfo:updater
            repeats:YES];
 }
 
-- (void) exitWhenDone:(NSTimer *)timer
+
+// Delegate method that lets us append extra info to the system-info URL.
+//
+- (NSArray *) feedParametersForUpdater:(SUUpdater *)updater
+                  sendingSystemProfile:(BOOL)sending
 {
-  SUUpdater *updater = [timer userInfo];
+  // Get the name of the saver that invoked us, and include that in the
+  // system info.
+  NSString *saver = [[[NSProcessInfo processInfo] environment]
+                      objectForKey:@"XSCREENSAVER_CLASSPATH"];
+  if (! saver) return @[];
+  NSString *head = @"org.jwz.xscreensaver.";
+  if ([saver hasPrefix:head])
+    saver = [saver substringFromIndex:[head length]];
+
+  return @[ @{ @"key":         @"saver",
+               @"value":       saver,
+               @"displayKey":  @"Current Saver",
+               @"displayValue":        saver
+             }
+          ];
+}
+
+
+- (void) pollUpdaterTermination:(NSTimer *)t
+{
+  SUUpdater *updater = [t userInfo];
   if (![updater updateInProgress])
     [[NSApplication sharedApplication] terminate:self];
 }
 
+
 - (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)app
 {
   return YES;